Here’s a useful way to extend the functionality of the JURN Firefox addon. The addon Site Search 1.5 puts a new green icon next to your normal blue one…

…and clicking on the green icon searches the contents of the site you’re at. If you’re searching JURN and can see your starting article, then you’re assured that JURN indexes the URL where it’s kept.

Site Search 1.5 is new (May 2009) and works in the latest version of Firefox. It also adds functionality to the right-click menu when highlighting phrases in pages…

Update: January 2010. Seems to have vanished from the web. Try this (less elegant) addon instead. If you also run GreaseMonkey in Firefox, also try this script.